Note: The following table shows Food Network Kitchen's preferred internal temperatures for meat and poultry based on taste and texture. Out of a concern for safety, the USDA recommends higher temperatures for whole cuts of beef and lamb than we do.
In skillet, cook onion in ... Spread mixture over flounder fillets (that you have washed). Roll ... Pour over fillets. Bake in hot 400 degree oven for 25 minutes. Sprinkle with ... with fork. Serves 4.
Fresh flounder & reasonably thick fillets can reduce the chances of the fish turning to mush. I cooked just over 1 lb. of flounder about 10 below the broiler element, for 10 minutes. Crust did not burn, and the meal was very good.